After incision over the narrow ridge at #30 (Fig.1) and ridge reduction (Fig.2 black area on the top; Fig.4 arrowheads), a 1.6 mm drill is used (Fig.2 (CBCT coronal section) long vertical black area) to start BEB (bone expansion and Bending).  It is expected that the cortical and cancellous bone of the buccal (B) and lingual (L) plates can be expanded after use of Magic Expanders (ME) and 1.6 mm drill alternatively.  In fact it appears that only the cancellous bone is pushed after use of MEs from 3 to 4.3 mm (Fig.3 arrows).  There is no apparent cortical bone bending.  There may be cancellous bone condensation.

Bone Condensation Instead of Bending Last Next

 Xin Wei, DDS, PhD, MS 1st edition 12/14/2017, last revision 09/16/2018